The Research And Design Of Millimeter-Wave Low Noise Amplifier

Into the Internet era,people's daily lives have undergone earth-shaking changes.As Internet technology becomes more convenient,the transmission rate requirements of communication systems are becoming higher and higher.This growing demand is driving the advancement of wireless communication technology.The millimeter wave band has extremely rich spectrum resources and higher transmission rate,which is an important research direction for the advancement of wireless communication technology.The Low Noise Amplifier(LNA)is the key circuit of the receiver front end of the communication system.This thesis focuses on the study of millimeter-wave LNA,investigates relevant research results at home and abroad,summarizes its research status,development trends,basic principles and related theories.Finally,two 140GHz low-noise amplifiers with different structures are designed based on 65 nm CMOS process.Firstly,this thesis summarizes the development history of wireless communication systems,clarifies the important role of LNA research in the advancement of modern wireless communication technology,summarizes the research status and development trends presented in related literature in recent years,and expounds the background and significance of this thesis.Secondly,this thesis briefly analyzes the basis of some device characteristics involved in millimeter wave integrated circuits,and summarizes the noise theory,performance index and main circuit structure of low noise amplifier.This is the basis and theoretical guidance of circuit design in this thesis.Finally,this thesis details the two 140GHz LNAs designed.Based on the foregoing theory,the first design and simulation is a 140 GHz common source LNA.The circuit uses a five-stage cascaded common source structure consisting of a microstrip line and a capacitor to form a matching network.The structural optimization design of the microstrip line was carried out to improve its quality factor.The electromagnetic characteristics of the microstrip line and the metal connection line were analyzed by Momentum of ADS software to take into account its parasitic effects,and finally the simulation was completed in Cadence software.The results showed that in the frequency range of 130GHz?150GHz,the 7.3dB noise figure,17dB gain,and 54.1mW power consumption are achieved,the input impedance is matched to 50?.,and the layout area is 0.15mm2.For the narrow bandwidth and high power consumption of this circuit,another 140GHz Cascode LNA is designed.The circuit uses a three-stage cascaded Cascode structure.To further optimize the performance of the circuit,noise reduction and gain enhancement techniques are also applied.The simulation results showed that in the frequency range of 120GHz?160GHz,8dB noise figure,12.4dB gain and 16.2mW power consumption are achieved,and the input and output are well matched,and the layout area is 0.24mm2.Compared with the previous circuit,the bandwidth is doubled and the power consumption is greatly reduced.